Phonograph-sound-box connection.



C. S. BURTON. PHONOGRAPH SOUND BOX CONNECTION.

APPLICATION FILED JAN- IT, I917.

Patented Nov. 20, I917.

ionirnn snares CHARIJES S. BURTON, 03 OAK ?AltE, IRLINOIE,

PHQNUGRAPH-SOUND-BOX CUNNECTXQTLT.

' Applicetionfiled January 17, 1917. Serial No. teases.

To all whom it may concern:

Be itlmown that I, CHARLns S. Bmrron, a citizen of the United States, residing at Oak Park, in the county of Cook and State of Illinois, have invented new and useful Improvements in Phonograph-Sound-Box Connections, of which the following isa specification, reference being had to the accompanying drawings, forming a part thereof. l

The purpose of this invention is to provide an improved connection between the sound box and the tone arm of a phonograph, adapted to permit swiveling of the two connected parts for adjustment of the sound box to two positions, and particularly adapted to permit such adjustment for zigzag and hill-and-vale records, the specific purpose being to insure the adjustment from one position to the other being made completely and not halted with the parts at an intermediate position. It consists in the elements and features of construction shown and described as indicated in the claims.

'- In the drawings Figure 1 is a side elevation of a portion of the tone arm and sound box embodying this invention, a portion of the sound box being broken away to show other parts which are in section with respect to'telescoping and swiveled members.

Fig. 2 is a similar view with the sound box in the other of the two positions to which it is adjustable for adaptation to the difierent types of records.

Fig. 3' is a section at the line, 33, on Fig. 2.

v Fig. i is a section similar to the sectional part of Fig. 1, showing a modification in certain details.

i In the drawings the free end of the swinging tone arm, 1, has an elbow, 2, whose angle is about 135 degrees, so that the terminal,

to be turned from a position at which the stylus, 7, may coiiperate properly with a laterally-undulating or zig-zag type of record, to a position at which it may cooperate properly with 'avertically undulating or Specification of Letters Patent.

New, 119M.

hill-and-vale type of record. The two members, 3 and 5; are connected together for this swiveling action by a stud, 9., projecting from one of them, (for convenience of illustration here shown as the outer one) engaging a circumferentially-extending groove, 10, in the other member, the extent or" said groove being substantially 90 degrees about the axis of the two inter-telescoped members. Extending axially through said inter-telescoped members and protruding through their respective elbows at opposite ends there is a spindle, 12, which for the purpose which it is to serve is required to be non-rotatable with respect to one of said members, and, as illustrated, it is made nonrotatzible with the elbow member, 2, on the and extending it through a bridge piece, 13,

in said elbow having asquare opening to accommodate said squared end of the spindle. At the other through the elbow member which for that purpose has a boss, 4*, (which is conveniently produced by means of a screw so lettered, screwed into the elbow to the head, and thereby ri id with the said elbow memher) said boss having an axial aperture through which the spindle extends, and havmg 12, of the spindle engaged, and adapted to be disengaged by the longitudinal thrust downward of the said spindle. "Within the two inter-telescoped members, a spring, 15, is coiled around the spindle, being attached to the spindle at e upper end near the squared portion r d attached at the lower end to elbow inember, e, such attachment being most co *eniently made as illustrated by engaging said lower end of the springin the screw, i The end of the spindle which. protrudes above the elbow, 2, may be provided with a knob, 12, for convenience of thrusting it against the axial re action of the spring, 15, which is coiled and dimensioned so as to react thus axially for thrusting the spindle upward and protruding it, or increasing its protrusion, above the elbow, 2, such longitudinal movement being stopped by the cross-pin, 12, engaging the bottom of the cross-slot, 4 in the boss, 4*, 0n the elbow, 4c.

The parts are assembled by first placing the spring about the spindle and securing end the spindle eme ges.

the openin in the elbow, 2, simultaneously engaging the two inter-telescoping terminals, 8 and 5, of the elbow members, and se curing the knob tightly on the protruding upper end of the spindle. The lower elbowmember, 4, will now be rotated about the axis oi said inter-telescoping members untll the spring is sufhciently tensioned circum-,

fcrentially to react reliably for rotating the elbow member, 2, with respect to the elbow member, 4., against the friction of their inter-telescoping joint, bringing the circumferential slot, 10, around; to a position at which the stud 9, may be inserted through the outer of said inter-telescoped members at their joint into said slot, said stud being preferably constructed with a threaded outer end portion andreduced inner end portion, so that it issorewed into said outer member for engaging its reduced end in said slot.

The operation. of the device constructed as described is that initially the stud, 9, stands at one'en'd of the slot, 10, when the sound is in position for cooperating with one type of record, for example the zigzag or laterally undulating type; and at this position the spring by its lateral reaction holds the pin, 12 engaged with the cross slot, e, in the boss of the elbow, a. When the operator now presses the knob upon the upper end of the spindle downward, thrusting the spindle longitudinally for disengaging the cross-pin from the slot, the circumferential reaction of the spring rotates they lower elbow member, l, through ninety degrees, swinging the sound box to the position for coiiperating with'the other type of record, carrying the stud, 9, to the opposite end of the slot, '10. When the operator desires to restore the sound box to the initial position, it may be done by taking hold of it and rotating it with the elbow member, l, upon the axis of the inter-telescoped member until the crosspin, 12, snaps into the cross-slot, e, which will. lock the sound box in the new position. Thus the sound box is certain to be at either one position or the other and cannot stand in any intermediate position. within the range of the swiveling movement of the two intcr-telescoped members.

lln Fig. t there is shown a detail modification which consists in providing a boss at 2 on the elbow member, 2, for affording guide bearing for the spindle, 12, and dispensing with the bridge piece, 13, the spindle being.

without the squared part and being held non-rotatable with respect tothc elbow, 2, by a pm, 14, engaging a longitudinal groove or slot, 12 in the spindle. In this form the boss, l, is shown integral with the elbow member, In this form the winding up of the spring to tension it for its reaction to rotate the elbow member, is effected by turning the spindle after the parts are assembled before inserting the pin, 14, in the slot, 12.

1 claim 1. In a phonograph in combination, a sound box, a tone arm and tubular connections from the sound box to the tone arm comprising two inter-telescoping swiveled members, one on the tone arm and the other on the sound box; and means for limiting the relative swiveling action;- a spindle substantially axial with respect to said intertclescoped members and longitudinally movable and non-rotatable with respect to one of them; means by which said spindle is engaged'with the other member against rotation relative thereto, and disengageable by said longitudinal movement; and a spring engaged for circumferential reaction be-.

tween said mter-telescoped members and axial reaction between said spindle and the first mentioned of said members.

2. In a phonograph in combination, a sound box, a tone arm and tubular oonnections from the sound box to the tone arm, comprising two inter-telescoping swiveled members one on the tone arm and the other on the sound box; means limiting their relative swiveling movement; a spindle extend ing axially within said inter-telescoping members, longitudinally movable and nonrotatable with respect to the member which is carried on the tone arm, the coiled spring having one end connected to said spindle and the other end to the other of said intertelescoping members, and coiled for circumferential reaction between said spindle and said last-mentioned of the inter-telescoping members, said spring being also stopped on said last mentioned member for reaction axially between said member and said spindle, and a feather on said spindle which engages said last mentioned member and is disen gageable therefrom by longitudinal movement of the spindle in opposition to the axial reaction of said spring, said spindle being extended out through one of said intertelescoping members vfor exterior manual engagement for longitudinal actuation in 0 )osition to said s lin aeaaao member on the tone arm but longitudinally movable with respect to both said intertelescoping members; means by which the spindle is engaged with the member on the sound box against relative rotation and adapted for disengagement by longitudinal movement of said spindle; a spring coiled about said spindle and engaged at one end therewith and at the other end with said sound box memben for both circumferential and axial reaction between said spindle and said sound box member, the end of said spindle which protrudes from the elbow of the tone arm member being accessible for in ward thrust in opposition to said axial reaction of the spring to disengage said spindle from the sound box member.

4. In combination with the two tubular inter-telescoping swiveled members of the sound conduit; means limiting their swiveling movement; an axial stem Within them non-rotatable with respect to one of them and longitudinally movable with respect to both of them; means for engaging and disengaging the stern and the relatively rotatable member by longitudinal movement of the stem, and a spring coiled about said stem and connected at one end thereto and at the other end to the relatively rotatable member, and reacting both circumferentially for rotation of said rotatable member and engagement of the same with the stem.

In testimony whereof, I have hereunto set my hand at Chicago, Illinois, this 16th day of January, 1917.

CHARLES S. BURTON. 

